Adaptive beacon interval in WLAN

a beacon interval and adaptive technology, applied in the field of adaptive beacon intervals in wlans, can solve the problems of terminal generation traffic, consuming battery power, reducing throughput, etc., and achieve the effect of improving the overall combined performan

Inactive Publication Date: 2008-02-19
NOKIA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]An object of the invention is to provide a beacon interval in a Wireless Local Area Network w...

Problems solved by technology

In worst case, a WLAN terminal has to remain on a channel for the entire duration of a beacon interval, thereby consuming battery power and reducing throughput, in order to receive the beacon frame.
A drawback of active scanning is that WLAN terminal generates traffic by transmitting special requests to nearby Access Points.
If there are large number of active WLAN terminals with active scanning capability, the throughput available for useful user payload data is decreased.
However, it will the take a long time for WLAN terminals to scan for Access Points in the area and to update RSSI and load information for alrea...

Method used

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  • Adaptive beacon interval in WLAN
  • Adaptive beacon interval in WLAN
  • Adaptive beacon interval in WLAN

Examples

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Embodiment Construction

[0027]FIG. 1 shows an exemplifying Wireless Local Area Network(WLAN) having a structure and operation in accordance with the present invention.

[0028]The WLAN in FIG. 1 includes two so-called basic Service Sets, BSS-A and BSS-B, each including an Access Point (AP) and WLAN terminals in communication with or serviced by the Access Point. BSS-A includes the Access Point 20 and the WLAN terminal 25, while BSS-B includes the Access Point 30 and the WLAN terminals 35, 36 and 37. The Access Points 20, 30 are connected to a Distribution System(DS) 40 which typically is a wired Local Area Network or some other kind of backbone network interconnecting the different Access Points of the WLAN. The DS is typically further connected to one or more servers 45 and / or further networks, e.g. the Internet or the like (not shown). The DS allows a WLAN terminal to communicate, via an Access Point, with other terminals connected to the WLAN or with servers 45 or other entities to which connection can be ...

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Abstract

The present invention relates to Wireless Local Area Networks and Access Points in such networks, in particular it relates to the control and use of varying beacon intervals in such networks. According to the present invention, the beacon frames in the Wireless Local Area Network are provided with an adaptive beacon interval. The interval is adapted in dependence on a current network load such that the length of the beacon interval is decreased when the network load is decreased and increased when network load is increased. The invention is applicable in existing as well as future IEEE 802.11 standards.

Description

TECHNICAL FIELD [0001]The present invention relates to Wireless Local Area Networks and Access Points in such networks, in particular it relates to the control and use of varying beacon intervals in such networks.BACKGROUND OF THE INVENTION [0002]Wireless Local Area Networks(WLAN) can be used to replace wired Local Area Networks or as extensions to wired LAN infrastructures and are standardized for example in accordance with the IEEE 802.11 standards.[0003]In a Wireless Local Area Network, beacon frames are used for enabling WLAN terminals to establish and maintain communications in an orderly fashion. The beacon frames are transmitted by the Access Points(AP) at regular intervals and include a frame header and a body with various information, i.a. a Service Set Identifier(SSID) identifying the name of a specific WLAN and a beacon interval specifying the time interval between two beacon transmissions. The beacon interval is a static, configurable parameter in an Access Point.[0004]O...

Claims

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Application Information

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IPC IPC(8): H04Q7/24H04L12/28H04W48/12
CPCH04W48/12
Inventor VAISANEN, ARIORAVA, PEKKAHAVERINEN, HENRY
Owner NOKIA CORP
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